fix(roadmap-update-plan-progress): propagate Plans** regex hardening from phase-lifecycle

Applies the same [ \t]* + section-boundary lookahead fix that was applied
to planCountPattern in phase-lifecycle.ts. roadmap.update-plan-progress
shared the same corruption vector via \s* crossing newlines.

Addresses coderabbit finding on PR #2736.

sdk/src/query/roadmap-update-plan-progress.ts

@@ -84,7 +84,7 @@ export const roadmapUpdatePlanProgress: QueryHandler = async (args, projectDir,
     });
 
     const planCountPattern = new RegExp(
-      `(#{2,4}\\s*Phase\\s+${phaseEscaped}[\\s\\S]*?\\*\\*Plans:\\*\\*\\s*)[^\\n]+`,
+      `(#{2,4}\\s*Phase\\s+${phaseEscaped}(?:(?!\\n#{2,4})[\\s\\S])*?\\*\\*Plans:\\*\\*[ \\t]*)[^\\n]+`,
       'i',
     );
     const planCountText = isComplete